Band-clamp.



No. 649,9!6. Patented May 22, |900.

C. W. DIETRICH.

BAND CLAMP.

(Application filed Jan. 13, 1899.)

(No lWindel.)

Ihvirrtn @rares Parati/r @rincer CHARLES lV. DIETRICH, OF CHICAGO,ILLINOIS.

BAND-CLAIM P.

SPECIFICATION forming part of Letters Patent No. 649,916, dated May 22,1900.

Application liletl JOvllllly 131 1399. Serial No. 702,097. (No inodel Toall 'whom 'it may concern:

Be it known that l, CHARLES W. DIETRICH, of Chicago, in the county ofCool; and State of Illinois, have invented certain new and usefulImprovements in BandClamps, of which the following is a specilication.

This invention relates to improvements in clamping-bands for securingnon-conducting coverings, such as asbestos or the like, upon steam orother pipes, but also equally adapted for use in other situations wheretlexible metallic bands provided with clamping means l'or drawing theends of the band together are required.

The object ot the invention is to provide an improved construction indevices of this character; and it consists in the matters hereinafterset forth, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure l is a transverse section of a pipehaving a oevering that is shown as clamped in place by a bandconstructed in accordance with my invention. Fig. 2 is a perspectiveview of the band alone. Fie. is a sectional detail showin 0 D b theintertitting formation of the engagin surfaces of the clamping-nut andthe bitnrcated lug which embraces the clamping-bolt when the band isapplied.

A designates the body of the band, which is of tlexible construction, sothat it may be wrapped around the pipe or other object to which it is tobe applied, it being to this end herein shown as made of a strip of thinsheet metal having sutiicient i'lexibility to enable it to be placedaround or removed from the pipe Without diiliculty.

B designates a screw-bolt having a clamping-nut B and connected with oneend of the band in any suitable manner, as by a pivot* pin Z), which isherein shown as inclosed Within a loop d, formed by folding over andriveting the end of the sheet-metal body A. O designates a bifurcatedlug securely fastened to the other end of the band by riveting orotherwise and adapted to receive the shank of the bolt B between ears c,which form its projectingbifurcated portion. Desirablyand as hereinshown the lu g C is not located quite at the end of the band; lout theextremity a of the latter projects beyond the lng and normally underliesthe overlapping looped end u, to which the bolt B is secured, thusserving to bridge the space spanned by the bolt itself.

To prevent the ears c from beingl forced apart by the pressure of theclampingnut when the band is tightened, as is found to be the tendencyunless special means are provided to prevent it, and to prevent the boltfrom accidentally slipping from between said ears when the nut istightened, the proximate surfaces ot the nut and lug are constructedwith concentric intertting corrugations. As herein shown, these consistof a rib b' on the nut, which enters a groove c/ in the face of the lug,so that when the nut is tightened the parts are, in ettect, locked iniixed relation laterally with respect to each other. This is a featureof great importance in the practi cal construction of a device of thischaracter.

In Fig. l a band thus constructed is shown as applied to a pipe P tohold anasbestos or other covering p in place on the pipe, the manner ofits application being so readily understood as to require no furtherexplanation. Obviously this is only one of the many situations in whichthe device can be advantageously used. It is especially well adaptedAtor hose-couplings and for holding lagging in place on pipes andcylinders and for almost any other purpose for which cla1nping-bands areemployed.

It will be observed that the groove c is located away from the edge ofthe slot forming the ears, so that a flange c2 is formed which extendsentirely around the inner end of the slot, Which not only insures the"locking together of the two ears and the nut, but at the same timeleaves the nut free to be turned, as usual, to tighten or remove theclamp.

As is Well known, the best (because it is the simplest and cheapest)form of connection for clamp-bands of the sort herein referred to is thepivoted-bolt and nut device, the bolt being pivoted to one end of theband and the nut being adapted to engage a bifurcated lug on the otherend, as shown; but as heretofore constructed this form of fastening isse riously objectionable,because the conical boss necessarily employedto prevent the nut slipping off the lug frequently spreads the lugsapart and breaks them, rendering the clamp useless. I avoid thisobjection by the intera IOO fitting and interlocking projection anddepression, which is preferably in the form of the concentric rib andgroove shown, so as to not only permit the nut to be turned, as usual,and'prevent it slipping off the ears, but also to lock the two ears tothe nut, and thereby prevent lateral spreading.

I claim as my invention- 1. A band-clamp comprisinga Iiexible bodyhaving attached to one end a screw-bolt and to its other end a lngslotted to receive said bolt, and a device adjustable on the free end ofthe bolt and adapted to engage the lug upon opposite sides of the slottherein, the contacting faces of the ears of the lug and said devicebeing provided with interlocking projections and depressions, wherebysaid device and the ears are locked together and lateral spreading ofthe ears is avoided.

2. A clamp, consisting of a flexible body, a bolt attached to one endthereof, a nut on the free end of the bolt, a lug on the other end ofthe body, slotted to form ears between which the bolt is received, agroove-and-rib lock being formed in the contacting faces of the nut andears thereby locking the nut and ears together laterally.

3. Aband-clanip comprising a flexible body, a screw-bolt connected toone end of the body and carrying at its free end an adjustableclamp-nut, and a slotted lug-secured to the other end of the band andadapted to receivel the bolt between its ears, the contacting faces ofthe nut and ears being provided with a concentric interlocking rib andgroove, set back from the edge of the slot and locking the ears to thenut and thereby securing them against lateral spreading.

4L. A band-clamp comprising a flexible body, a screw-bolt pivotallyconnected at one end to one end of the band and provided with anadjustable nut on its free end, the other end of the band being providedwith a lug slotted to form a pair of ears, the bolt being adapted to fitbetween the ears and the nut to bear upon the same, the contacting facesof the nut and ln g being provided with an interlocking, concentric riband groove, extending entirely around the inner end of the slot and uponboth ears, for the purposes set forth.

In testimony that I claim the foregoing as my invention I affix mysignature hereto, in the presence of tWo subscribing Witnesses, this 3dday of January, 1899.

CHAS. NV. DIETRICH. Witnesses:

HENRY W. CARTER, M. E. MARSH.

